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CCNA 3 Chapter 6 Switches. By Your Name. Objectives. LAN design LAN switches. LAN Design Goals. Functionality Scalability Adaptability Manageability. LAN Design Considerations. The function and placement of servers Collision - detection issues Segmentation issues
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CCNA 3 Chapter 6Switches By Your Name
Objectives • LAN design • LAN switches
LAN Design Goals • Functionality • Scalability • Adaptability • Manageability
LAN Design Considerations • The function and placement of servers • Collision-detection issues • Segmentation issues • Broadcast domain issues
LAN Design Methodology • Gather requirements and expectations • Analyze requirements and data • Design the Layer 1, 2, and 3 LAN structure, or topology • Document the logical and physical network implementation
Logical Structure Routers provide scalability because they serve as firewalls for broadcasts. They can also provide scalability by dividing networks into subnetworks, or subnets, based on Layer 3 addresses.
Access Layer Shared bandwidthSwitched bandwidthMAC layer bandwidthMicrosegmentation
Access Layer Switches • Catalyst 1900 series • Catalyst 2820 series • Catalyst 2950 series • Catalyst 4000 series • Catalyst 5000 series
Distribution Layer • Aggregation of the wiring-closet connections • Broadcast/multicast domain definition • VLAN routing • Any media transitions that need to occur • Security
Distribution Layer Switches • Catalyst 2926G • Catalyst 5000 family • Catalyst 6000 family
Core Layer The core layer is a high-speed switching backbone. The core layer should be designed to switch packets as fast as possible.
Core Layer Switches • Catalyst 6500 series • Catalyst 8500 series • IGX 8400 series • Lightstream 1010